Update summarize.py

summarize.py

@@ -119,7 +119,7 @@ def summarize_via_tokenbatches(
             **kwargs,
         )
         score = round(float(score), 4)
-        rate = round(float(len(_id)-l)/len(_id)),3)
+        rate = round(float((len(_id)-l)/len(_id)),3)
         _sum = {
             "input_tokens": _id,
             "summary": result,